Method of extracting water from pulp gaskets



VM F.BUTLER METHOD OF EXTRACTING WATER FROM PULP GASKETS Filed April-9. 1921 M M W Patented d, 1923.

WILLIAM F. BUTLER, 0F HILLSIDE, NEW JERSEY, ASSIGNOR TO AMERICAN CAN CDM- I PANY, 05 NEW YORK, N. Y., A

ernr

CQREORATION 0F NEJV JERSEY.

,METHOD OF EXTRACTING VIATEE hItOld PULP GASKETS.

Application filed April 9,

To all whom it may concern:

Be it known that I, lVILLIAM F. BUTLER, a citizen o1 the United States, residing in Hillside, in the county of Union and State of New Jersey, have invented a new and useful Improvement in Methods of'EXtracting lVater from Pulp Gaskets, of which the following is a specification.

This invention relates in general to the provision of a gasket upon the flange of a flanged can end for attachment to a can body by interfolding said flange with the flange of a can body to form a double seam. Effort has been made to apply these gaskets by introducing a fibre pulp upon the flange and drying out the liquid constituent, as water, to leave the deposited fibre. The dry-ingout-of this water or other liquid is slow and an expensive operation.

My present invention has for its principal object the reduction ofthe extent of drying necessary and even under proper conditions the elimination of the need of any oven or heat agency. Although the invention will hereinafter be described in connection with a gasket forming material consisting of water and wood or fibre pulp it will he readilyg apparent as the invention is better understood that it is capable of efficient use with other materials 9A further object of the invention is the accomplishment of this result without requiring'complicated, sensitive or expensive additional apparatus, machinery or parts, and which may be operated. for long periods without requiring frequent repair or replacement.

Numerous other objects. and advantages of the invention will beapparent as it isbetter understood from the following description, which, taken in connection with the accompanying drawings, discloses a preferred embodiment thereof.

On the drawing, c

Figure 1 is a cross section of so much of the apparatus is necessary to an under standing of the present invention; and

' Fig. 2 is a bottom plan view of the plunger. a

My present invention relates both to a process andto the apparatus for carrying it (out. The process contemplates the placingotzthe gasket pulpmaterial in the flange of the can end in any usual or preferred tashioneither as pulp or for that c-matter as 1921. Serial no. 460,109.

green paper (pulp in its condition after being extracted from pulp mixture). When pulp is used the gasket is, of course, fluid and when the green material is used it is wet and soggy so that in both eventualities art-ificial drying has been high y desirable. My invention contemplates the positive absorption from the deposited gasket material of excess moisture and to an extent to reduce to a minimum and-where possible to entirely eliminate the necessity of heat dyring.

After the gasket material is placed on the can end, which on the drawing is indicated by reference character 8, it rests upon the flange 9 and between the shoulder 10 and outer curl 11, the gasket being indicated at 6; This gasket is then pressed down by a suitable absorbent material, this pressure preferably squeezing the water or, other liquid from the gasket body and absorbing it by capillary action. The gasket material used is preferably highly absorbent felt 5 or other material oi high capillary power. The physical apparatus for accomplishing this is simple and may consist 01"? a support 12 having a raised part or rib 13 to fit in behind the shoulder 10 of the can end and hold the can end centered. Above this I provide a plunger 14.- having a plunger stem 15 for attachment in a suitable machine (not shown on the drawing but which, of course, may be hand or power driven). The plunger is provided with an internal recess 16 in which fits a pressure member 17 having an outer wall 18 registering with the. shoulder 10. This pressure member is connected by two bolts 19 threaded at 21 into the pressure member and extending through apertures 22 in the plunger. Springs 23 are provided to permit the ressure member to yield in the nlunger movement. The plunger has a downwardly extending flange 2i adapted to move down over the can end curl and this flange provides a pocket with the outer face of the pressure member 18 for the holding of the absorbent material 5.

This material is arranged in the form of an annulus and is adapted to be compressed tightly. against the gasket material driving the water out of it and permitting its absorption by the felt. A number of ducts T are arranged in the plunger to permit excess water to be squeezed out of the felt under thepressure stroke. That is to say when the felt has absorbed more water it can hold when in compressed condition the water in it is squeezed out of it in these ducts and deposited outside by the plunger. When the pressure is relieved the high absorptive power causes the remaining water to be taken up and the gasket is formed in merely damp compacted condition. The gasket is then given such slight drying as may be necessary or it may be dried by merely stacking inthe air.

. It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. The process of providing fibre gaskets in flanged can ends adapted to be inter-. folded with the flange of flanged can bodies to form hermetic closures, which comprises applying a fluid pulp to the flange of the end and pressing and absorbing the fluid constituent therefrom.

2. The process of providing fibre gaskets in flanged can ends adapted to be inter-- folded with the flange of flanged can bodies to form hermetic closures, which comprises applying a fluid pulp to the flange of the end and pressing and absorbing the water i therefrom.

3. The process of providing fibre gaskets in flanged can ends adapted to be interfolded with the flange of flanged can bodies to form hermetic closures, which comprises placing a fluid pulp on the flange of the can end and extracting from one surface only the fluid constituent therefrom by means'of an absorbent medium. 7

l. The process of providing fibre gaskets in flanged can ends adapted to be interfolded with the flange of flanged can bodies to form hermetic closures, which consists in placing a fluid pulp on the flange of the can end and extracting from one surface only the fluid constituent therefrom by absorbing it with a material having high capil lary power.

5. The process ofprovidingrfibre gaskets inflanged can ends adapted to be interfolded with the flange of flanged can bodies to form hermetic closures, which consists in placing a fluid pulp on the flange of the can end and extracting from one surface only the fluid constituent therefrom by squeezing said material between the flange of the end and an absorbing medium.

.6. The process of providing fibre gaskets ,in flanged can ends adapted to be interfolded with the flange of flanged canbodies to form hermetic closures, which comprises depositing the pulp in a succession of can ends, pressing firmly upon the deposited pulp with an absorptive medium, and at the same time squeezing out of said absorptive medium previously absorbed liquid.

7. In an apparatus for use in the provision of fibre gaskets on flanged can ends to be interfolded with flanged can bodies to form hermetic seams, a support for a can end containing a fluid pulp in its flange, an annular absorbent member, 'a carrier for said absorbent member, said carrier and said support having relative approaching movement to cause said member to contact with the pulp to permit absorption of liquid.

8. In an apparatus for use in the provision of fibre gaskets on flanged can ends to be'interfolded with flanged'can bodies to form hermetic seams, a support for a can end containing a fluid pulp in its flange, an annular absorbent member, a carrier for'said absorbent member, said carrier and said support having relative approaching movement to permit said member to press upon the said pulp and squeeze water therefrom.

9. Asupport for the can end with the pulp on its flange, an absorbent member adapted to enter into the flange, a carrier for said member, and means forcing said member down into said flange to squeeze the liquid constituent from the pulp in the fibre.

10. A support for a can end with the pulp on its flange, a member adapted to enter into the flange, a carrier for said member, and means forcing said member down into said flange to squeeze the liquid constituent from the pulp in the fibre, said member being adapted to conduct said liquid constituent away from said can end.

11. A support for a can end with the pulp on its flange, a member adapted to enter into the flange, a carrier for said member, and means forcing said member down into said flange to squeeze the liquid constituent from the pulp in the fibre, said member being adapted to conduct said liquid constituent away from said can end for exterior disposition of the same.

12. A support for a can end, .a plunger head, a pressure member carried by said plunger head and adapted to yieldingly engage a shoulder of the can end, an annulus having high capillary power carried in said plunger adapted to enter the flange to absorb the liquid constituent of the pulp while the can end is held by, said pressure member.

18. A support for a can end, a plunger head, a pressure member carried by said plunger head and adapted to yieldingly engage a shoulder of the can end, an annulus the can end is held by said pressure mem-' her, said plunger having an outer Wall embracing said support and confining said annulus in its absorbing action.

14. In an apparatus for use in the provision of fibre gaskets on flanged can ends to be interfolded with flanged can bodies to form hermetic seams, a plunger, a center pressure member for engaging a shoulder of the can end, an absorbent yielding material between said pressure member and the outer Wall of said plunger, said plunger being adapted to be pressed down upon the can end to cause said absorbent material to squeeze the liquid constituent from the pulp and contain the same;

15. In an apparatus for use in the provision of fibre gaskets on flanged can ends to be interfolded with flanged can bodies to form hermetic seams, a plunger, a center pressure member for engaging a shoulder of the can end, an absorbent yielding material between said pressure member and the outer Wall of said plunger, said plunger having ducts to permit the liquid constituent to pass off from the absorbent material in the squeezing action.

16. In an apparatus for use in the provision of fibre gaskets on flanged can ends to be interfolded With flanged can bodies to form hermetic seams, a plunger, a center pressure member for engaging a shoulder of the can end, an absorbent yielding material between said pressure member and the outer Wall of said plunger, said plunger having ducts to permit the liquid constituent to pass ofi? under the pressure of the plunger when the absorbent material contains said liquid constituent in excess of ist capillary capacity under pressure.

WILLIAM F. BUTLER. 

